Inspection device.



W- H. PETTENGILL.

INSPECTION DEVICE.

APPLICATION men JULY 23. m4.

1,1 61,882. Patented Nov. 30, 1915. i

Wal l a ce 11- Rik/797'- .with a removable illuminating means, pref- WALLACE I-I. PETTENGILL, OF CHICAGO, ILLINOIS.

INSPECTION DEVICE.

Specification of Letters Patent. Patented NOV. 30, 1915.

Application filed July 23, 1914. Serial No. 852,726.

2 is a top plan view thereof with the cover removed. Fig. 3 is a fragmentary detail section taken on line III-III of Fig. 1.

As shown in the drawing: My improved device comprises a rectangular view tunnel 26, provided on the exterior thereof with a long tubular casing 27, which, at its lower To all whom it may concern:

Be it known that I, WALLACE H. PETTEN- GILL, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improve.- ments in Inspection Devices; and I do hereby declare that the following is, a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention has for its object the construction of an inspection device provided opens through an aperture into the view tunnel casing 26. Said casing 27 is of a size sufiicient to permit the insertion and removal therethrough of an incandescent bulb 29, and, in order to limit the movement thereof into proper position at the bottom of said casings, resilient plates 30 and 31 are provided, extending partly across the opening between said casings. Thus the bulb is held in position to throw the light downwardly, and the upper resilient plate 30 acts to shield the eyes of an observer from the rays thereof. An angle iron 32, bent to the shape of the view tunnel, is secured thereto and to the casing 2, rigidly to connect the two, and a switch or contact mechanism is mounted in a casing 13, provided at the upper end of the view tunnel 26. Lead wires 33 and 34 are connected to the bulb 29 and to the switch mechanism, and receive the current, when the contact is made, from the battery within the casing erably such as an electric bulb, which is automatically connected to a source of electric energy to cause illumination of the bulb when the cover of the device is open, permitting an observer to look therethrough.

This invention is well adapted for use in scientific investigations, as any object, either under water or beneath the surface of the ground, or in an otherwise inaccessible place, readily may be observed from a convenient position.

This device isadapted for connection more particularly to a casket or coflin, so that when the casket has been buried, an observer standing over the grave may, by

throwing back the cover of the"inspection .23, secured on one side of the view tunnel. g ggf 'i the remamv -----A pane of glass 35 is secured in the upper More particularly this invention consists 811a? 716W llIlIlel 2 and a hinged of an inspection device provided with a View cover 36 is adapted n losed to cover tunnel and a separate light tunnel, permiteach f sald casings 26 and 27, and when ting illuminating means to be lowered p of course w g entlrelv y from through said light tunnel to the bottom boflh thereof- Thls arrangement also P P thereof and there communicating in said mlts the bulb to be taken y, 50 that. view tunnel to illu in t th lower d the event of unauthorized use of the device, thereof, so that an observer at the upper I 10t 111 00556881011 Of a bulb cannot See end of the view tunnel readily may view Wlthln t sk t; objects beneath or at the lower end thereof. I claim as my invention:

A further object of my invention is to An inspection dev1ce comprising a tunprovide means for positioning the light nel, a tubular casing fixed to the exterior of automatically when it reaches the bottom of said tunnel and curved at its lower end tothe tunnel, so that it may be in proper posiward said tunnel, the latter belngapertured tion to illuminate the object below. opposite said curved port1on, res1l1 ent upper In the drawings: Figure 1 is a vertical and lower plates dlsposed in said tunnel sectional view of my improved device. Fig. above and below said aperture, and a light end, is rounded or curved inwardly, as indicated by the reference numeral 28, and

llrafisalaill Copies of this patent may be obtained for five cen scribed my name in the presence of two;

subscribing Witnesses.

WALLACE H. PETTENGILL.

WVitnesses:

CHARLES WV. HILLs, J12, FRANK K. HUDSON.

ts each, by addressing the Commissioner of Patents,

Washington, D. C. 

